Hello, first of all sorry if this is the wrong place to post this or ask for assistance.
I recently bought a cs:go server and I am looking to create a surf server. I have downloaded a plugin required but as it came in a zip I don't know how to extract it into the plugins folder. When I click the extract button on the zip folder (when it's in the servers files) it gives me this message "Could not load file or assembly 'Mono.Posix, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' or one of its dependencies. The system cannot find the file specified." Any help/suggestions? the zip folder is not the same as the other default plugins there weirdly. The other plugins there (installed with sourcemod) are single files called .smx whereas this plugin consists of an addons folder then a metamod folder and a maps folder leading into more folders!

I have installed file zilla and have been trying to move the files, it seems the server wont accept some of these files. They are all .so files. I have gone through the properties of the files and it seems there is nothing wrong. Maybe the issue is serverside? Are there permissions blocking this?